<template>
    <div class="list" ref="wrapper">
      <div>
        <!-- 多个区域 -->
        <div class="area">
            <div class="title border-topbottom">当前城市</div>
            <div class="button-list">
                <div class="button-wrapper">
                    <div class="button"> {{ city }}</div>
                </div>
            
            </div>
        </div>
        <div class="area">
                <div class="title border-topbottom">热门城市</div>
                <div class="button-list">
                    <div class="button-wrapper" v-for="item in hot" :key="item.id" @click="handleCityClick(item.name)">
                        <div class="button">{{ item.name }}</div>
                    </div>
                </div>
            
        </div>
        <div class="area" v-for="(item,key) of cities" :key="key" :ref="key">
            <div class="title border-topbottom">{{ key }}</div>
            <div class="item-list">
                <div class="item border-bottom" v-for="innerItem in item" :key="innerItem.id" @click="handleCityClick(innerItem.name)">  {{ innerItem.name }} </div>
            </div>
        </div>
       
      </div>
    </div>
</template>

<script>
    import Bscroll from 'better-scroll'
    import { mapMutations, mapState } from 'vuex'
    
    export default {
        name: 'CityList',
        props:['cities','hot','letter'],
       
        methods: {
            handleCityClick(city){
                // alert(city)
                // this.$store.commit('ChangeCity',city)
                this.ChangeCity(city)
                // 选择城市后跳转
                this.$router.push('/')
            },
            ...mapMutations(['ChangeCity'])

        },
        computed:{
            ...mapState(['city'])
        },
        watch:{
            letter(){
                if(this.letter)
                {
                    const element = this.$refs[this.letter][0]
                    // console.log(element);
                    // 跳转到对应区域
                    this.scroll.scrollToElement(element)
                }
            }
        },
         mounted() {
            this.scroll = new Bscroll(this.$refs.wrapper)
            
        }
    }
</script>

<style lang="stylus" scoped>
  @import '~styles/varibles.styl'
  .border-topbottom
    &:before
      border-color: #ccc
    &:after
      border-color: #ccc
  .border-bottom
    &:before
      border-color: #ccc
  .list
    overflow: hidden
    -webkit-overflow-scrolling: touch
    position: absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0
    .title
      line-height: .54rem
      background: #eee
      padding-left: .2rem
      color: #666
      font-size: .26rem
    .button-list
      overflow: hidden
      padding: .1rem .6rem .1rem .1rem 
      .button-wrapper
        float: left
        width: 33.33%
        .button
          margin: .1rem
          padding: .1rem 0
          text-align: center
          border: .02rem solid #ccc
          border-radius: .06rem
    .item-list
      .item
        line-height: .76rem
        padding-left: .2rem
</style>